PureAire Monitoring Systems, Inc.
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5.3 Sensor Cell Removal and Installation
5.3.1 Sensor Removal
DO NOT Power Down the monitor. This procedure should be performed with the
monitor powered ON to maintain the Pyrolizer temperature.
1.
Remove the sensor by gently rocking the sensor side-to-side and simultaneously pulling it up from
the flow chamber.
2.
Place a flat business card over the opening of the flow chamber to seal the opening. This will
prevent a flow fault.
3.
Unplug the sensor cable from the sensor cell by pulling straight up.
CAUTION: Do not twist the sensor; this will loosen the box nut and cause the cell to leak electrolyte
CAUTION: Avoid spilling electrolyte out of the small opening on the side of the sensor.
Methyl Bromide Sensor and Flow Chamber
5.3.2 Sensor Installation
IMPORTANT: Be careful not to turn the sensor or touch the membrane on the bottom of the sensor
during installation. Oil on your fingers can block the small pores on the membrane surface.
1.
Remove the sampling system front cover by unfastening the 4 plastic captive screws.
2.
Remove the sensor shorting plug or battery if supplied.
3.
Plug the methyl bromide sensor into the flow chamber inside the instrument housing.
NOTE:
Do not twist the gas sensor inside the flow chamber. This may loosen the sensor
cell box nut on the Methyl bromide renewable sensor cell and cause the electrolyte to leak.
Sensor Cell Cable and
connector
Methyl Bromide
Renewable Sensor
Cell
To Install
Install the sensor cell
into the flow cap by
gently rocking the cell
and pushing straight
down until it seats.
Note: A small gap
between the cell and
flow cap is normal.
Flow Chamber
To Remove
Gently rock the sensor
side to side side-to-side
and simultaneously
pulling it up from the
flow chamber
.
